Currently when you add a field, filter criterion, contextual filter or relationship to your view, fields are listed by labels and their real machine names are not shown, so you can't search them. This is rather inconvenient when you have a lot of fields with generic labels like "Name", "Title" or "Category" which are actually different entities in the database, like "field_client_name", "field_customer_title" or "field_news_category".

I created a sandbox which adds this ability: https://www.drupal.org/sandbox/onkeltem/2449443

Consider adding this to the core as option for developers.

Comments are welcome.